Hey.
After adding the item, an error undefined method `key?' for nil:NilClass
its my controller products:
... # GET /products/new # GET /products/new.json def new @product = Product.new
respond_to do |format| format.html # new.html.erb format.json { render json: @product } end end ...
model product:
lass Product < ActiveRecord::Base has_many :line_items before_destroy : ensure_not_referenced_by_any_line_item
attr_accessible :title, :description, :image_url, :price
validates :title, :description, :image_url, :price, presence: true validates :price, numericality: {greater_than_or_equal_to: 0.01} validates :title, uniqueness: true # validates :image_url, allow_blank: true, format: { # with: %r{ \.(gif|jpg|png)$}i, #message: 'gif, jpg png. ' #}
def ensure_not_referenced_by_any_line_item if line_items.empty? return true else errors.add(:base, " существуют товарные позиции") return false end
end
class CreateProducts < ActiveRecord::Migration def change create_table :products do |t| t.string :title t.text :description t.string :image_url t.decimal :price
t.timestamps end end end
How solve this problem?
